Vol. 15—1961 - NorthEastern Weed Science Society

308.
TABLEII - Comparison of Products and ExPerimental Haterials for Tolerance
to Seeds Planted Into Treated Areas.
Location: AmchemResearch Farm, Ambler, Pa,
Method: Treatments were applied on Nay 4 to plots 6 ft. bY20 ft. ,
Bands of seed were spread on May 5, 12, 19 and June 2; 1 day, 1 week,
2 weeks and 4 weeks after treatment. '
Estimates of the stand of seeded grasses were made 9 weeks after
chemical treatment. During the course of the season, severe stands
of foxtail and general broadlea.f weeds developed in the area. The
foxtail was eliminated luth -two light applications of DSMA,the
small broad1eaf weeds were removed with a single treatment of It
Ib/A 2,4-D arn.ine~ The 2,4-D removed most of the clover, so no
reading ~as made on .,this. The DSMA.~,app1ied after the observation
date, slightly reduced the quality of bent, blue and rye, and in
many cases practically eliminated seedling fescue.
10 • normal stand
0 • complete kill
Stand of Seeded Grasses July 8
Interval after treatment before seeding
Chemical Rate Grass 1 dar 1 week 2 weeks 4 weeks
XF-832 3/4 1b/M bent 9 10 10 7
blue 8 9 9 4
fescue 8 9 9 4
rye 10 10 10 7
XF-832 1! lb/M bent 10 10 9 6
blue 10 10 7 6
fescue 10 10 7 3
rye 10 10 8 7
XF-834 3/4 lb/M bent 9 10 8 5
blue 10 8 8 3
,fescue 10 8 7 3
rye 10 10 9 7
XF-834 1i Ib/M bent 10 10 9 6
blue 9 10 8 5
fescue 7 10 7 3
rye 10 10 9 9
3/4 lb/M bent 10 10 9 5
blue 10 10 9 5
fescue 10 10 9 5
rye 10 10 9 8
XF-83:3 Ii 1b/l-l bent 10 10 8 5
blue 10 9 8 5
fescue 10 7 6 :3
rye 10 10 8 6